Caleb s



NAFETERS, PHOTOALITHOGRAFHER, WASHINTON. D CA OALEB S. NELSON, OF WEST TROY, ASSIGNOR TO HIMSELF AND HENRY l. SEYMOUR, OF TROY, NEW YORK.

MODE OF SETTING STATIONARY STEAM-BOILERS.

Speccation forming part of Letters Patent No. 55,958, dated June 26, 1866.

To all 'whom it may concern:

Be it known that I, CALEB S. NELSON, of

` the village of West Troy, county of Albany, and State of New York, have invented new and useful Improvements in the Mode or Manner of Setting Stationary Steam-Boilers 5 andl do hereby declare that the following is a full, clear, and exact description of the same, reference being hereby had to the accompanying drawings, and to the letters ofreference marked thereon, which make a part of this specification.

Like letters represent and refer to like or corresponding parts.

Figure lis a perspective view of my said invention and improvements in the mode or manner of setting' stationary steam-boilers, substantially as herein described and set forth. Fig. 2 is a vertical cross-section through the center of the steam-dome, showing the said chamber surrounding the said stationary steamboiler and the steam-dome in the manner substantially as herein described and set forth. Fig. 3 is a vertical section through the center, lengthwise 0f the same, and showing the annular chamber, or chamber surrounding the stationary steam boiler, in the manner and for the purposes substantially as herein described.

Heretofore in thesettin gof stationary steamboilers by means of brick and stone or other mason-work the same have been attended with many difficulties, among which are the follow ing, to wit: First, there has been a great waste of heat, and consequently a large increase in the consumption of fuel, in order to generate the required amount of steam for the movement of machinery and for other purposes 5 and, second, hitherto 1t has been quite difficult to set a stationary steam-boiler with stone or other mason-work so that the same would endure the expansion of the boiler ironwork caused by the great heat required to generate the necessary amount of steam. The constant expansion and contraction of the iron would after a while destroy the said n1asonwork in or upon which the boiler Was set by starting the same apart and in pieces, and thereby render the Whole structure unit and unsafe touse until the boiler is reset, which would of course be an often occurrence and attended with great expense.

By my aforesaid named invention and im! provements consists in the arrangement andI construction of an annular chamber, or a chambersurroundingastationarysteam-boiler, or the steam-dome thereof, in the manner and for the purposes substantially as herein described and set forth.

Having thus described the diculties hitherto attending the setting of stationary steamboilers by means of mason-Work, and the nature of my invention and improvements designed to overcome these difficulties, as well as for otherpurposes hereinafter described and set forth, l will here proceed to describe the construction of the mason-work and the mode or manner of the setting of stationary steamboilers under or according to my plan, invention, and improvement, which is as follows, t0- Wit:

A, Figs. l, 2, and 3, is the mason-Work, and is of brick or other suitable material. B is the stationary steam-boiler. and" is made in the usual manner of making steam-boilers. O is the steam-dome, and is also constructed in the usual way. D is the man-hole, of the usual construction and usual purpose. E, Fig. 2, is the steam-pipe extending upward from the said steam-dome, and is for the usual purpose.

' u, Figs. 2 and'3, is the annular chamber, or chamber surrounding the said steam-boiler and steam-dome, and extending' the entire length of the said boiler. This chamber may be constructed of any size or capacity deemed best to use in the setting of the said boiler, and it` is formed or constructed by means of the said brick or mason work A. I prefer, however, to have that part of the said chamber above the boiler-dues or center line ofthe boiler, and of course surrounding the upper portion of said boiler and the steam-dome thereof', of about two inches in depth, or the said mason-work surrounding such portions may be of about two inchesfrom the said boiler or steam-dome by which the arch is formed. This space or chamber is for the purpose of receiving and preventing the escape of the heat which arises from the tire in the tirechamber Gr, Fig. 3, and from the heating of the boiler for the purposes of generating steam. There being no escape, for the heat, and it being thus thrown around and upon such portions of said boiler and steam-dome, all or nearly all of the heat thus generated is saved and retained in and around the said boiler and dome, except such parts as are taken up by means of said mason-work. There is, and will continue to be, great economy in the use of fuel upon the iire-grate H, Fig. 3, upon which the fire is built in the combustion-chamber G, Fig. 3, the heat from which passes over the bridge I at the rear end of the said chamber of combustion G, into the lower chamber, J,

under and along lthe said boiler, thence over the mason-work K, upon which rests the stud or upward projection L, Fig. 3, upon which rests `the rear end of the said boiler B, the front end of which boiler rests upon the front surrounding plate or end, M, same figure, and also as seen at Fig. l in perspective.

The said stud or upward projection L may be made of cast-iron or any suitable material, and it is only of size or capacity sufficient to retain and rmly hold the said rear end of such boiler; and the heat aforesaid passes on over said mason-work K into the chamber N, Fig. 3, and from thence into and through the boiler-dues b, Figs. 2 and 3, which are of the usual construction and purpose.

Upon the front end of the said boiler B, I construct an eXit pipe or chimney of any size or capacity which may be required, and which .l have not shown upon the drawings, not deeming the same essential or material for a correct understanding of my aforesaid invention and improvements.

0, Fig. 3,is the ash-pit or chamber, through and by means of which the fire in the' combustion-chamber G is supplied with atmospheric air to start and continue the combustion of the fuel.

It will be seen that the inner part or portion of the said mason-work above the center of said boiler is in the form of an arch, as it takes shape or form according to the size or shape of the boiler used, and is therefore lof strenth sufficient to hold and support all that part of said mason-work which is above a center horizontal line through the said boiler, and therefore the outer part of said masonwork may, if desirable, be level or of square shape, substantially as shown at Fig. l. The said mason-work may of course be of any sufficient capacity or strength required.

The said dome() is surrounded by the said chamber a, which chamber is closed up at or near the top of the said dome by means of said mason-work, in the manner substantially as shown at P l), Figs. 2 and 3, so that no heat can then escape from the said annular cham# ber, or chamber surrounding the said boiler -and steam-dome, and the said mason-work terminating at and around the steam-pipe E, with a small space between the same and the immediate top of said steam-dome, there will be sufficient space to allow of any upward expansion of said dome without destroying the mason-work immediately above said dome, as aforesaid, and` yet retain the heat in said annular chamber, as aforesaid.

It is manifest that by the suspending of said boiler in and upon the said front plate, M, and upon the said cast-iron stud or projection L, Fig. 3, and so constructing thc said masonwork entirely surrounding said boiler, and yet not coming in immediate contact with the same or any part thereof', the said boiler and the steam-dome thereof may expand, as aforesaid, without any injury or liability to destroy or injure the said mason-work by the heating and reheating of the said boiler, as aforesaid.

It is also manifest that by the construction of the said mason-work entirely surrounding said stationary boiler, and the suspending of said boiler within the same, so as to form a chamber surrounding the boiler, and also around the said steam-dome vin the manner aforesaid, the heat will arise in said annular or surrounding chamber and prevent any heat from the boiler or domefrom being wasted, and will also prevent the cold air from coming in contact with the said boiler or dome, and thereby somewhat cool the same, and, of course, require more fuel for the generation of steam required for use; but by retaining the heat around said boiler and dome, and preventing the coldV air from coming in contact with said boiler or dome, there is great economy in the use and consumption of fuel upon said fire-grate, substantially as aforesaid.

VIt will therefore be seen that the steam above the water-line in the said stationary boiler becomes superheated to a much greater degree through and by means of the said annular chamber, or chamber surrounding the said stationary boiler and steam-dome, constructed in the manner substantially as aforesaid, whereby there will be much greater economy in the use and consumption of t'uel, and the steam thus generated, being rendered more dry, is much better adapted to use than saturated steam, as would be the case to a considerable extent but for the employment of the said surrounding chamber a, by which the escaping heat is gathered .up and retained to operate upon said boiler, and especially upon that portion which is above the said dues or water-line, and, being thus and there restrained, it operates upon the iron of the boiler and steamdome, and' thus and thereby contributes to the superheating of the steam within said boiler and above a water-line.

The aforesaid invention and improvement may be applied to a series of stationary steamboilers arranged and set side by side, if found necessary so to do, without changing the character or main feature of my said invention.

Having thus described my said invention and improvements, 'what I claim, and desire to secure by Letters Patent of the United States of America, is-

1. The annular chamber or surrounding chamber a, formed between 'the stationary upper surface of such steamvboiler, so as to prevent the escape of heat, in the manner and for the purposes substantially as herein de-a.

described and set forth.

In testimony whereof l have on this 27th day of December, A. D. 1865, hereunto set my hand.

GALEB S. NELSON.

Witnesses:

CHARLES D. KELLUM, R. D. REILLEY. 

